165 



should be applied under pressure especially into the heart and against 

 the under-sides of the leaves, three treatments at intervals of fourteen 

 days giving the most satisfactory results. 



Ho WITT (J. E.) & a-^sAR (L.). The More Important Fruit Tree 

 Diseases of Ontario.— 0;i^. Dept. Agric, Toronto, Bull. no. 257, 

 December 1917, 43 pp., 28 figs. 



To this bulletin is appended a spray calendar, giving the number 

 and times of applications against the common diseases and insect 

 pests of apple, pear, plum, cherry and peach trees. There are also 

 formulae for the common insecticides and fungicides. 



Sanders (J. G.). Setting Fruit Trees where Locusts are Expected.— 

 Wkly. Press Bull., Pennsylvania Dept. Agric, Harrisburg, iii, 

 no. 6, 7th February 1918. 



A warning is issued against the planting and priming of young fruit 

 trees in certain districts of the State of Pennsylvania, either in 1918 or 

 1919, on account of the expected appearance of brood x of the 17-year 

 locust [Tihicen septenidecim], which is due in 1919. 



Campbell J. A.). Work for the Coming Month. The Orchard.— JL 



Agric. Wellington, N.Z., xv, no. 6, 20th Decsmber 1917, 



pp. 346-318. 

 These notes recommend the usual treatments against common 

 orchard pests. Thus red mite [Tetranychus] can be held in check by 

 the continual use of hme-sulphur combined with lead arsenate when 

 spraying for codling moth ; if woolly aphis [Eriosoma lanigerum] is- 

 to be dealt with at the same time. Black-leaf 40 should be added, or 

 Black-leaf 1-800, and lead arsenate alone may be used. The second 

 brood of codUng moth [Cydia potnonella], which, hatches out far more 

 simultaneously than the first, is on the wing during the latter half of 

 January and February ; consequently the fruit and foliage must be 

 kept covered with lead arsenate mixture during this dangerous stage. 

 The pear-slug [Eriocampoides lirnacvna'] is easily controlled by spraying 

 once or twice during the season with lead arsenate. 



DoDD (A. P.). The Cane Grubs of Australia. Part II. — Queensland 

 Bureau of Sugar Expt. Stations, Brisbane, Div. Entom. 13ull. no. 6, 

 1917, 30 pp. [Received 22nd February 1918.] 



Further investigation [see this Review Ser. A, iii, p. 490] has estab- 

 lished the fact that Lepidiota albohirta, L. rothei, Cacochroa decorticata, 

 Anoynala antiqua {australasiae), and probably Dasygnathus australis, 

 Semanopterus depressiusculus and Haplonycha sp., have a one-year 

 life-cycle, while most other species of cane-grubs take two years to 

 complete their development. 



Lepidiota albohirta was not unusually abundant in 1915, and there 

 was no great damage to cane-fields except in isolated cases where 

 estates on open volcanic soils had hundreds of acres of cane completely 

 killed. Pupae ploughed up during September and October were 

 found not deeper than 8 inches, owing to frequent rains in August and 

 September having kept the soil moist. In 1914 there appears to have 



